RHSA-2011:1458 - Security Advisory

Synopsis

Important: bind security update

Type/Severity

Security Advisory: Important

Topic

Updated bind packages that fix one security issue are now available for RedHat Enterprise Linux 5 and 6.

The Red Hat Security Response Team has rated this update as havingimportant security impact. A Common Vulnerability Scoring System (CVSS)base score, which gives a detailed severity rating, is available from theCVE link in the References section.

Description

The Berkeley Internet Name Domain (BIND) is an implementation of the DomainName System (DNS) protocols. BIND includes a DNS server (named); a resolverlibrary (routines for applications to use when interfacing with DNS); andtools for verifying that the DNS server is operating correctly.

A flaw was discovered in the way BIND handled certain DNS queries, whichcaused it to cache an invalid record. A remote attacker could use thisflaw to send repeated queries for this invalid record, causing theresolvers to exit unexpectedly due to a failed assertion. (CVE-2011-4313)

Users of bind are advised to upgrade to these updated packages, whichresolve this issue. After installing the update, the BIND daemon (named)will be restarted automatically.

Solution

Before applying this update, make sure all previously-released erratarelevant to your system have been applied.

This update is available via the Red Hat Network. Details on how touse the Red Hat Network to apply this update are available athttps://access.redhat.com/kb/docs/DOC-11259